I believe any corporation that does not maximize profits for shareholders can be sued for dereliction of fiduciary duty. The problem here is that InBev was trying to maximize returns by promoting their beverage via a trans celebrity, which just happened to piss off bigots in the GOP. It was never about the losses to Florida's pension fund, which are minimal, (~$600k out of ~180billion.) I suspect DeSantis is just trying to scapegoat others for his mishandling of Florida's pensions and trying to vilify InBev for being inclusive, similar to what he tried with Disney.
I can only hope this will lead to corporations pulling support from the GOP.